Yeah, inflation is a thing. But so is increasing volumes in sales with low cost distribution of the product.

After a game is made now, the only cost is distribution now, and games sell in larger volumes than ever before, making more money than ever before. A game like BL4? Even if they spent $300,000,000 making the game they only need to sell 6,000,000 copies to recoup costs at $70. BL3 has sold 18,000,000 copies. A huge profit, even if most of those sales were on sale prices. BL3 was made and advertised with a 140 million dollar budget.